title: Matrix metalloproteinase 9 level predicts optimal collagen deposition during early wound repair in humans.
abstract: BACKGROUND
  This study examined two matrix metalloproteinases (MMPs) and their association with deposition of collagen during wound repair.
  
  
  METHODS
  In 15 hernia wounds, wound fluid was collected using two Cellstick devices, which were implanted adjacent to two expanded polytetrafluoroethylene (ePTFE) tubes. MMP-2 and MMP-9 levels were analysed 24 and 48 h after operation using specific enzyme-linked immunosorbent assays, and collagen deposition in the ePTFE tubes was measured 10 days after operation as hydroxyproline.
  
  
  RESULTS
  The levels of both MMPs in wound fluid were increased compared with those of control serum, although MMP-9 decreased (P < 0.01) in the wounds 24-48 h after operation. The MMP-9 level at 24 h correlated inversely and specifically to deposited collagen measured as hydroxyproline (rs = -0.80, P < 0.01).
  
  
  CONCLUSIONS
  These results indicate that the level of MMP-9 in the early inflammatory phase can predict the amount of collagen deposited later in the wound healing process.
authors.affiliation: Department of Surgery, Sundby Hospital, Copenhagen, Denmark.
authors.forename: M S
authors.initials: MS
authors.lastname: Agren
authors.forename: L N
authors.initials: LN
authors.lastname: Jorgensen
authors.forename: M
authors.initials: M
authors.lastname: Andersen
authors.forename: J
authors.initials: J
authors.lastname: Viljanto
authors.forename: F
authors.initials: F
authors.lastname: Gottrup
mesh_terms: D000328:Adult; D000368:Aged; D015415:Biomarkers; D003094:Collagen / Q000378:metabolism*; D017364:Collagenases / Q000378:metabolism*; D017558:Elective Surgical Procedures; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006552:Hernia, Inguinal / Q000378:metabolism / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D008297:Male; D020780:Matrix Metalloproteinase 9; D008875:Middle Aged; D014945:Wound Healing / Q000502:physiology*
chemical_list: D015415:Biomarkers; D003094:Collagen; D017364:Collagenases; D020780:Matrix Metalloproteinase 9